Edgewise-winding machine.



H. L. BARNHOLD'I'.

EDGEWISE WINDING HAGHINB.

APPLICATION rum 001.11, m1.

Patented Apr. 6, .1909.

Inventor.- Haro/aLBamho/dt, y WM my km is UNITED STATES PATENT OFFICE.

HAROLD L. BAHNHOLDT, or rnrsrinLo. nlissxcnt'snr'rs, ASSIGNOR, Bi nEsNE ASSIGN nnu'rs, 'ro GENERAL ELECTRIC conrAxY, A CORPORATION or NEW YORK.

EDGEWISE-WINDIN G MACHINE.

No. mam.

Specification of Letters Yatent.

Patented April 6, 1909.

Application filed. October 17, 1907. Serial No. 397,829.

T all whom it may concern:

' Be it known that I, HAROLD L. BARS- noun, a subjectof the King of Sweden, residing at Pittsfield. county of Berkshire,

State of Massachusetts, have invented cer' tain new and useful Improvements in Edgewise-Vinding Machines, of which the following is a specification.

.This invention relates to machines for bending a thin flat strip of metal in a circle in its own plane, When the operation is continuously-performed on a long narrow stri or ribbon, a helical coil is.produced. Sucli edgewise Wound coils are new largely used in dynamo-electric machines, as the windings for field magnets, end rings for induction motors, and the like. In the machines heretofore em loyed for this purpose, a certain amounto stock is wasted in starting ti coil owing to the nepessity for fastening the end of the ribbon, or inserting it far enough. into the winding head to enahie thestarting pin to engage with it. This left a long end at the'beginning of the coil which had to be trimmed oil.

- The object of the present invention is to provide a simple and eliicient machine of this class which will wind coils without any waste, thereby enabling one to make coils from predetermined lcn 'ths of ribbon and containing any number 0 convolutions even no more than one, if desired.

The machine consists of a stationary guide and former, a rotating gripper head, and stationary cams for operating the grip crs, all as hereinafter set forth and particular y pointed outin the claims,

In the accompanying drawing, Yigure 1 is a longitudinal sectional elevation of the working parts of my device; Fig. 2 is an end elevation of the same; lig. 3 is an end view of the grip er head; rig. 4 is an elevation of the cam p ate which actuates the grippers; Fig. 5 is an edge view of said plate; Fig. 6 is a cross section of the same on the line 6 6, Fig. 4; Fig. 7 is an edge view of the forming late and Pi 8 is a 'ers ect-ive view of the rality of sockets whose axes are parallel with the axis of the hub, the socketsbeingar-- ranged in a circle concentric with said axis. In each socket is a plungerv 4 having at its rear end ahead 5, between which and the end I of the socket a helical-sapling 6 is confined. The front end of the plunger rejects through the flange 3 and is for-me with teeth, as shown in Fig. 3. A circular mandrel 7 is screwed into the end of the hub, forming an axial-extension thereof. Clainped between the hub and a shoulder on the mandrel is a rin 8 of bardened steel, which projects beyond the flange 3 by an amount equal to the thickness of the metallic ribbon which is to be coiled edgewise, say six hundredths ot an inch. I

A stationary plate 9 is journaled on the mandrel, and contains a circular recess 10 concentric with the axis of the hub and mandrel. The ring 8 sets into said recess and abuts closely against the bottom thereof. The diai'neter of the ring determines the inner diameter of the edgewise wound coil, and the diameter of the circular recess in the plate 9 corresponds with the outside diameter of said coil, while the depth. of said recess equals the thickness of the metallic ribbon.

The annular recess or chamber formed by the ring, the recess and the flange 3, is thus adapted to receive the ribbon and form it into a circle as the ribbon is fed through a groove 11 in a guide-plate 12 which is let into the plate 9 so that said groove is in the same plane as the annular forming chamber, and communicates therewith on a tangent.

An oblique passageway 13 is cut throu h the plate 9 at a point just below where t e strip is fed into the guide-plate, which serves to direct the strip from the planeof the forming chamber and guide it out around the mandrel.

The ribbon 14 is dragged around through the annular forming chamber by means of the toothed or roughened ends of the plum gcrs which project into said chamber from the flange 3. Anannular cam 15 is arranged adj accnt to the heads 5 of said plungers, and the cam surface is so designed as to force the gri )pers into engagement with the metallic rib on H the instant they arrive in line with the feeding groove 11, and allow the springs to disengage them from the ribbon just as it reaches the oblique delivery slot or passageway 13. The cam 15 is concentric with the hub, being formed on a Jlat 16 ha v a central hole in which said liub rotates freelly.

The plates 9 and 16 are rigidly bolted to-.

them to enable the ivcrkman to hold thet lates from rotating with the hub and in'anre In operation, the ribbon 14 is ushecl into E the tangent guide-groove 11 unti its end enters the circular forming-chamber concentric with the. ring 8, Where it is gripped by the" roughened ends of the lungers 4 and dragged around thr gagh said chamher m l its end i ieliVBIW r Lire lmuque slut %3;'he successive coils sliding out along the g Ribbons of any length can be grip iers to engage with and release the ribmandre 7. used. There is no wast-e01 stock, and the machine operates with greatrapidity and accuracy.

' What I claim as new and desire to secure 1. Ali edgewise Winding machine comprising'a rotatable hub, a plurality of grippers carried thereby, and a stationary plate having a circular recess with which sai grippers cocperate.

2. An edgewise winding'machine comprising a rotatable hub, a plurality of gripper lungers carried thereby, astationary plate having an annular recess, and a cam for giving movement to sai gripping plungers.

circular recess concentric with said hub, and

a guide-plate having a feeding glmflfjj gent to said recess.

4. All 0Llg 'ii "';i;'mg maelsine emnprisg Mame hub, a plurality ci grippers Qirried thereby, stationary plz'ie having a circular recess concentric with ml huh, an oblique slot, and means for carrying said hon sing wound.

5. An eclgewise winding machine comprising a rotatable huh having flange cut-aining sockets, spring actuated plungcis in said.

scckcts, a stationary cam-plate mOpei-atingwith "said plungers, a stationary formingplate having a circular recess concentric with said hub, amla guide-plate having a ceiling groove tangent to said recess. n fitness whereof, I l 2-'v'( l11'(!lnt-0 my hand this twelfth (la-y cl October, 19W.

HAROLD L. BAR NHOLDT. Witnesses P. A. SMITH, F. P. LARAMEE. 

